77321311 has 2 divisors, whose sum is σ = 77321312. Its totient is φ = 77321310.

The previous prime is 77321297. The next prime is 77321339. The reversal of 77321311 is 11312377.

It is a weak prime.

It is an emirp because it is prime and its reverse (11312377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77321311 - 2¹⁵ = 77288543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77321371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38660655 + 38660656.

It is an arithmetic number, because the mean of its divisors is an integer number (38660656).

Almost surely, 2^77321311 is an apocalyptic number.

77321311 is a deficient number, since it is larger than the sum of its proper divisors (1).

77321311 is an equidigital number, since it uses as much as digits as its factorization.

77321311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 25.

The square root of 77321311 is about 8793.2537208931. The cubic root of 77321311 is about 426.0230229205.

Adding to 77321311 its reverse (11312377), we get a palindrome (88633688).

The spelling of 77321311 in words is "seventy-seven million, three hundred twenty-one thousand, three hundred eleven".